One of the oldest types of New England fishing and trading vessels. It is schooner rigged, with a false stern and narrow transom that runs beyond the rudder at deck level.), sloopSloop. A sailing vessel with a single fore-and-aft rigged mast. boats (Muscongus Bay BoatsMuscongus Bay Boat.
â¢ ENDOSKELETON (noun). The noun ENDOSKELETON has 1 sense: 1. the internal skeleton; bony and cartilaginous structure (especially of vertebrates). Familiarity information: ENDOSKELETON used as a noun is very rare.
The endoskeleton and muscles form an organ system that permits rapid and efficient movement. The pectoral and pelvic fins of fishes evolved into jointed appendages that allowed vertebrates to move onto land. The skull, the most anterior component of the main axis of the vertebrate endoskeleton, encases the brain.embers of the class Myxini have a partial cranium (skull), but no vertebrae. Their skeleton is made of of cartilage, as is that of sharks. Hagfish lack jaws, and for this reason used to be classified with the lampreys in a group called the Agnatha (no jaws) or the Cyclostomata (round mouth).